iOS APNS在开发中使用生产证书

I have already read this question APNS Development [sandbox] vs Production , but it didn't help me.

My question is, how to use production cert in development. Here is my code, if I want to use apns in the development, I have to set client := apns2.NewClient(cert).Development(). Now I don't want to switch back and forth between production and development every time. What I can think of is to add a judgment,

if _, err := os.Stat("/path/to/debugfile"); err == nil {//Debugfile is just a file
  client := apns2.NewClient(cert).Decelopment()
} else if os.IsNotExist(err) {
  client := apns2.NewClient(cert).Production()
}

I want to know, i can use production cert in development. What does this sentence mean? How to use production certificates in development without judging the existence of debugfile？

func ApplePushNotificationService(deviceToken string, parameters string) {
    cert, err := certificate.FromP12File("./hookupAPNS.p12", "******") //p12.filename 
    if err != nil {
        log.Fatal("Cert Error:", err)
    }
    notification := &apns2.Notification{}
    notification.DeviceToken = deviceToken
    notification.Topic = "com.preferme.hookup"
    payload := payload.NewPayload().Alert(parameters).AlertBody(parameters).Badge(1).Sound("sound.wav").Custom("key", "val")
    notification.Payload = payload
    client := apns2.NewClient(cert).Production()
    res, err := client.Push(notification)
    if err != nil {
        log.Fatal("push Error:", err)
    }
    fmt.Printf("%v %v %v
", res.StatusCode, res.ApnsID, res.Reason)
}